#!/usr/bin/env python3
"""
测试与课程对话功能 - Dify 集成
"""

import asyncio
import httpx
import json

# 测试配置
API_BASE_URL = "http://localhost:8000"
LOGIN_ENDPOINT = f"{API_BASE_URL}/api/v1/auth/login"
CHAT_ENDPOINT = f"{API_BASE_URL}/api/v1/course/chat"

# 测试账号
TEST_USER = {
    "username": "test_user",
    "password": "123456"
}


async def login() -> str:
    """登录获取 access_token"""
    print("🔑 正在登录...")
    
    async with httpx.AsyncClient() as client:
        response = await client.post(
            LOGIN_ENDPOINT,
            data={
                "username": TEST_USER["username"],
                "password": TEST_USER["password"]
            }
        )
        
        if response.status_code == 200:
            data = response.json()
            token = data.get("access_token")
            print(f"✅ 登录成功，token: {token[:20]}...")
            return token
        else:
            print(f"❌ 登录失败: {response.status_code} - {response.text}")
            raise Exception("登录失败")


async def test_course_chat(token: str, course_id: int, query: str, conversation_id: str = None):
    """测试课程对话"""
    print(f"\n💬 测试与课程 {course_id} 对话")
    print(f"问题: {query}")
    if conversation_id:
        print(f"会话ID: {conversation_id}")
    
    headers = {
        "Authorization": f"Bearer {token}",
        "Content-Type": "application/json"
    }
    
    payload = {
        "course_id": course_id,
        "query": query
    }
    
    if conversation_id:
        payload["conversation_id"] = conversation_id
    
    new_conversation_id = None
    answer = ""
    
    async with httpx.AsyncClient(timeout=180.0) as client:
        async with client.stream("POST", CHAT_ENDPOINT, headers=headers, json=payload) as response:
            if response.status_code != 200:
                error_text = await response.aread()
                print(f"❌ API 调用失败: {response.status_code} - {error_text}")
                return None, None
            
            print("\n📡 SSE 事件流:")
            print("-" * 60)
            
            async for line in response.aiter_lines():
                if not line or not line.strip():
                    continue
                
                if line.startswith("data: "):
                    data_str = line[6:]
                    
                    try:
                        event_data = json.loads(data_str)
                        event_type = event_data.get("event")
                        
                        if event_type == "conversation_started":
                            new_conversation_id = event_data.get("conversation_id")
                            print(f"🆕 会话已创建: {new_conversation_id}")
                        
                        elif event_type == "message_content":
                            answer = event_data.get("answer", "")
                            print(f"\n💡 AI 回答:\n{answer}")
                        
                        elif event_type == "message_end":
                            print("\n✅ 消息接收完成")
                        
                        elif event_type == "error":
                            error_msg = event_data.get("message", "未知错误")
                            print(f"\n❌ 错误: {error_msg}")
                    
                    except json.JSONDecodeError as e:
                        print(f"⚠️  解析失败: {e} - {data_str[:100]}")
    
    print("-" * 60)
    return new_conversation_id, answer


async def main():
    """主测试流程"""
    print("=" * 60)
    print("🧪 与课程对话功能测试 - Dify 集成")
    print("=" * 60)
    
    try:
        # 1. 登录
        token = await login()
        
        # 2. 首次对话
        print("\n" + "=" * 60)
        print("测试场景 1: 首次对话（创建新会话）")
        print("=" * 60)
        
        conversation_id, answer1 = await test_course_chat(
            token=token,
            course_id=1,
            query="这门课程讲什么？"
        )
        
        if not conversation_id:
            print("\n❌ 测试失败：未获取到 conversation_id")
            return
        
        # 3. 续接对话
        print("\n" + "=" * 60)
        print("测试场景 2: 续接对话（使用已有会话）")
        print("=" * 60)
        
        _, answer2 = await test_course_chat(
            token=token,
            course_id=1,
            query="能详细说说吗？",
            conversation_id=conversation_id
        )
        
        # 4. 测试总结
        print("\n" + "=" * 60)
        print("📊 测试总结")
        print("=" * 60)
        print(f"✅ 首次对话: {'成功' if answer1 else '失败'}")
        print(f"✅ 续接对话: {'成功' if answer2 else '失败'}")
        print(f"✅ 会话管理: conversation_id = {conversation_id}")
        print("\n🎉 所有测试通过！")
    
    except Exception as e:
        print(f"\n❌ 测试失败: {str(e)}")
        import traceback
        traceback.print_exc()


if __name__ == "__main__":
    asyncio.run(main())